WHITEAVE8. J DEVONIAN FOSSILS OP MANITOBA, ETC. 321 



volution encircled by three rows of transversely elongated tubercles. 

 Volutions five, the first, second and third obliquely compressed and the 

 fourth with nearly vertical sides, the third and fourth encircled with two 

 rows of tubercles, one next to the suture above, and the other, which is 

 partially overlapped by each succeeding volution, at the suture below : 

 outer volution considerably inflated, obliquely flattened or concavely con- 

 stricted above the midheight and ventricose laelow, encircled with one row 

 of from twelve to fourteen crescentic or spout-shaped, elevated tubercles 

 close to the suture above, with a second row of somewhat similar but 

 much more elongated tubercles a little Iselow the midheight, and with a 

 third row of more feebly developed elongated tubercles around the base, 

 which radiate from its centre. Aperture Ijroadly rounded on the outer 

 side, more narrowly rounded at the base, its columellar side obliquely and 

 concavely emarginate by a slight encroachment of the preceding volution : 

 outer lip simple : columellar lip slightly thickened. 



Surface marked by fine transverse striiv or lines of growth, in addition 

 to the rows of tubercles. Casts of the interior of the shell have regularly 

 ventricose volutions with a deeply channelled suture, and the base of each 

 is perforated by a narrow but very deep umbilicus. 



Western shore of Dawson Bay, Lake Winnipegosis, at an exposure four 

 miles west of Salt Point (three specimens), and at the mouth of the Steep 

 Rock River (one specimen) ; D. B. Dowling, 1888. Lake Winnepegosis, 

 on the south-western shore at Weston Point (two specimens), and on the 

 south-eastern shore at Net Point (five specimens), — also in Dawson Bay, 

 at Whiteaves Point (abundant), at exposures two and four miles west of 

 Salt Point (four specimens), on a small island three miles north of that 

 point (one specimen), and at the mouth of the Red Deer River (one speci- 

 men) ; J. B. Tyrrell and D. B. Dowling, 1889. 



This species, like the last, is represented almost exclusively by sharply 

 defined moulds of the exterior of the shell, with corresponding casts of the 

 interior, the intermediate test not being preserved. The figures on Plate 

 xlii are drawn from gutta percha or wax impressions of two of these 

 natural moulds. One completely testiferous specimen, however, was 

 obtained at Dawson Bay. In its short spire and ventricose outer volu- 

 tion E. hrevispira shows a certain amount of similarity to the E. coelatum 

 {=z Ttirho ccdatus, Goldfuss) of the Devonian rocks of the Eifel, but the 

 latter shell is much the smaller of the two, and their sculpture is entirely 

 diiferent. 



(S.) EUNEMA SUBSPINOSUM. (N. Sp.) 



Plates 42, fig. 8, and 4.5, fig. 5. 



Shell small, turbinated, somewhat conical, a little longer than broad : 

 spire moderately elevated but shorter than the outer volution, base appa- 



